Remove consensus/types re-exports (#8540)

There are certain crates which we re-export within `types` which creates a fragmented DevEx, where there are various ways to import the same crates.

```rust
// consensus/types/src/lib.rs
pub use bls::{
AggregatePublicKey, AggregateSignature, Error as BlsError, Keypair, PUBLIC_KEY_BYTES_LEN,
PublicKey, PublicKeyBytes, SIGNATURE_BYTES_LEN, SecretKey, Signature, SignatureBytes,
get_withdrawal_credentials,
};
pub use context_deserialize::{ContextDeserialize, context_deserialize};
pub use fixed_bytes::FixedBytesExtended;
pub use milhouse::{self, List, Vector};
pub use ssz_types::{BitList, BitVector, FixedVector, VariableList, typenum, typenum::Unsigned};
pub use superstruct::superstruct;
```

This PR removes these re-exports and makes it explicit that these types are imported from a non-`consensus/types` crate.


Co-Authored-By: Mac L <mjladson@pm.me>

beacon_node/store/src/hot_cold_store.rs

@@ -18,6 +18,7 @@ use crate::{
     metrics::{self, COLD_METRIC, HOT_METRIC},
     parse_data_column_key,
 };
+use fixed_bytes::FixedBytesExtended;
 use itertools::{Itertools, process_results};
 use lru::LruCache;
 use parking_lot::{Mutex, RwLock};
@@ -38,6 +39,7 @@ use std::path::Path;
 use std::sync::Arc;
 use std::time::Duration;
 use tracing::{debug, error, info, instrument, warn};
+use typenum::Unsigned;
 use types::data_column_sidecar::{ColumnIndex, DataColumnSidecar, DataColumnSidecarList};
 use types::*;
 use zstd::{Decoder, Encoder};